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"""
pytts voice service (offline)
"""
import os
import sys
import time
import pyttsx3
from bridge.reply import Reply, ReplyType
from common.log import logger
from common.tmp_dir import TmpDir
from voice.voice import Voice
class PyttsVoice(Voice):
engine = pyttsx3.init()
def __init__(self):
# 语速
self.engine.setProperty("rate", 125)
# 音量
self.engine.setProperty("volume", 1.0)
if sys.platform == "win32":
for voice in self.engine.getProperty("voices"):
if "Chinese" in voice.name:
self.engine.setProperty("voice", voice.id)
else:
self.engine.setProperty("voice", "zh")
# If the problem of espeak is fixed, using runAndWait() and remove this startLoop()
# TODO: check if this is work on win32
self.engine.startLoop(useDriverLoop=False)
def textToVoice(self, text):
try:
# Avoid the same filename under multithreading
wavFileName = "reply-" + str(int(time.time())) + "-" + str(hash(text) & 0x7FFFFFFF) + ".wav"
wavFile = TmpDir().path() + wavFileName
logger.info("[Pytts] textToVoice text={} voice file name={}".format(text, wavFile))
self.engine.save_to_file(text, wavFile)
if sys.platform == "win32":
self.engine.runAndWait()
else:
# In ubuntu, runAndWait do not really wait until the file created.
# It will return once the task queue is empty, but the task is still running in coroutine.
# And if you call runAndWait() and time.sleep() twice, it will stuck, so do not use this.
# If you want to fix this, add self._proxy.setBusy(True) in line 127 in espeak.py, at the beginning of the function save_to_file.
# self.engine.runAndWait()
# Before espeak fix this problem, we iterate the generator and control the waiting by ourself.
# But this is not the canonical way to use it, for example if the file already exists it also cannot wait.
self.engine.iterate()
while self.engine.isBusy() or wavFileName not in os.listdir(TmpDir().path()):
time.sleep(0.1)
reply = Reply(ReplyType.VOICE, wavFile)
except Exception as e:
reply = Reply(ReplyType.ERROR, str(e))
finally:
return reply
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